EP0104914A1 - Recording and/or reproducing apparatus for discs - Google Patents
Recording and/or reproducing apparatus for discs Download PDFInfo
- Publication number
- EP0104914A1 EP0104914A1 EP83305701A EP83305701A EP0104914A1 EP 0104914 A1 EP0104914 A1 EP 0104914A1 EP 83305701 A EP83305701 A EP 83305701A EP 83305701 A EP83305701 A EP 83305701A EP 0104914 A1 EP0104914 A1 EP 0104914A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disc
- holder
- cover
- presser
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/04—Feeding or guiding single record carrier to or from transducer unit
- G11B17/05—Feeding or guiding single record carrier to or from transducer unit specially adapted for discs not contained within cartridges
- G11B17/051—Direct insertion, i.e. without external loading means
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/022—Positioning or locking of single discs
- G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
- G11B17/032—Positioning by moving the door or the cover
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
Definitions
- This invention relates to recording and/or reproducing apparatus for discs for audio or the like signals.
- the invention relates to a movable disc type recording and/or reproducing apparatus in which a disc table rotatably carrying the disc is moved radially of the disc for changing the relative position between the disc and a fixed recording and/or reproducing means including an optical pick-up unit for recording the desired information on predetermined tracks on the disc or for tracing or scanning the recorded tracks on the disc.
- a recording and/or reproducing apparatus for audio or the like signals is known in which the audio signals are recorded on a disc and read out or reproduced therefrom by a laser beam radiated towards the disc from a suitable optical pick-up unit.
- Such recording and/or reproducing apparatus is so arranged and constructed that the optical pick-up unit radiating the laser beam towards the rotating disc is moved radially of the disc for sequentially scanning the recording tracks.
- a recess for housing the disc on a disc table is covered by a pivotable disc cover.
- the optical pick-up unit is mounted fixedly on a chassis and the disc table is moved radially of the disc.
- the disc cover is opened to an obliquely upward position about a hinge provided close to one side of the disc recess.
- the disc can only be inserted or removed obliquely relative to the disc table.
- the centre spindle of the disc table tends to be out of alignment with the centre opening of the disc, resulting in a complicated disc mounting operation.
- a recording and/or reproducing apparatus for a disc comprising:
- the optical pick-up device 4 and the disc table 3 project from an elongated opening or slot 9 in a bottom wall 2B of the main body 1 and the disc table 3 is movable in the slot 9 in the direction shown by arrows A and B by feed means such as a stepping motor, not shown, so that the tracks on the disc 5 carried on the disc table 3 can be confronted by the objective lens 4A as a result of such radial movement of the disc 5.
- a pivotable cover 7 for closing the recess 2 has its base portion 7A hinged by a hinge 6 in the vicinity of a side 2A of the recess 2.
- An approximately L-shaped holder cover 10 formed as a box of smaller depth at the front is mounted on the inner surface 7B of the cover 7.
- An elongated opening or slot 11 is formed in a lower wall 10A of the holder cover 10, and a presser plate portion 8A of the disc presser 8 is mounted in the slot 11 to project outwardly therefrom and be movable longitudinally of the slot 11.
- the disc presser 8 has a cylindrical portion 8B, an upper holding ring 8C, and the presser plate portion 8A extending downwardly from the cylindrical portion 8B.
- the presser plate portion 8A is formed with a downwardly directed central recess 81 and an axially projecting peripheral disc abutment surface 82.
- a magnet 83 is secured to the bottom of the recess 81.
- the cylindrical portion 8B has an outside diameter to pass through the slot 11, whereas the ring 8C has a diameter larger than the width of the slot 11 so that the disc presser 8 is held by the holder cover 10.
- the disc table 3 has its central portion secured to an output shaft 31 of a motor.
- An annular buffer member 32 such as felt ring, is attached to the upper peripheral surface of the disc 5, whereas a central recess 33 is formed on the upper surface of the disc 5.
- a magnet mounting plate 34 and a disc centring plate 35 making up a centre spindle unit 3A are mounted on the output shaft 31 above the disc table 3.
- the magnet mounting plate 34 is secured to the end of the output shaft 31 and a magnet 36 facing the magnet 83 of the disc presser 8 is mounted on the magnet mounting plate 34.
- a disc centring plate 35 has a tapered peripheral portion 35A engaging in a central opening 5A of the disc 5.
- the centring plate 35 is loosely mounted on the output shaft 31 for movement vertically between the disc table 3 and the magnet mounting plate 34.
- a spring 37 is interposed between the centring plate 3.5 and the disc table 3.
- the magnets 83 and 36 are of opposite polarity and mounted in confronting relation so as to be attracted towards one another.
- the disc 5 With this disc chucking means, the disc 5 has its centre hole 5A presented 'to the spindle unit 3A of the disc table 3, whereby the disc 5 placed on the disc centring plate 35 is centred by interfitting of the magnet mounting plate 34 with the tapered peripheral portion 35A of the disc centring plate 35.
- the cover 7 is then closed, so that the disc presser 8 is pressed from above the disc 5 into engagement with the spindle unit 3A.
- the magnets 83 and 36 are confronted to one another on respective sides of the disc presser 8, and the disc abutment surface 82 of the disc presser 8 is pressed against the upper surface of the disc 5 by the resulting magnetic attraction, so that the disc centring plate 35 is depressed against the resiliency of the spring 37 until the lower surface of the disc 5 is pressed on the annular buffer member 32 of the disc table 3, and the disc 5 is clamped between the disc abutment surface 82 and the annular buffer member 32 for chucking.
- the feed means for the disc table 3 is intended to shift the disc table 3 in the direction shown by the arrows A and B in Figure 1, for linear scanning movement of the optical pick-up unit 4 with respect to the recording tracks of the disc 5, and may typically be formed by a stepping motor and associated disc driving means.
- the disc presser 8 is maintained by a holder 12 at a position corresponding to the initial position of the disc table 3 when the cover 7 is opened. It is also positively urged towards the disc table 3 when the cover 7 is closed.
- the disc presser 8 is designed to be movable relative to the holder 12 when the cover 7 has been closed.
- the holder 12 is formed as a flat plate having upright folded portions 121 and 122 on respective sides thereof and a central hole 123 extending to an opening 123A on a leading side 12A. On respective sides of the opening 123A, the leading side 12A is respectively formed with a pair of upright bent portions 124,124.
- a supporting shaft 126 carried between supporting members 125,125 projectedly mounted on the inner surface 7B of the cover 7 is passed through openings in the upright folded portions 121 and 122, and is carried rotatably to permit vertical movement of the leading side of the holder 12.
- An elongated central hole 127 is formed through the upright folded portion 121 for accommodating a pin 128 as later described.
- the hole 123 is of such size as to permit the passage of the cylindrical portion 8B of the disc presser 8 but to obstruct the passage of the ring 8C.
- the upright bent portions 124,124 are so arranged and constructed that, when the leading side 12A of the holder 12 is lifted, that is, when the cover 7 is opened, the upright bent portions 124,124 are engaged with the ring 8C of the disc presser 8 for holding the presser 8 within the hole 123 and, when the leading side 12A is depressed, that is, when the cover 7 is closed, and thus the disc presser 8 interfits with the disc table 3 through magnetic attraction for chucking the disc 5, the upright bent portions 124,124 are withdrawn to a lower position where they are not engageable with the ring 8C, in a manner so that the ring 8C can be moved outwards from the opening 123A of the hole 123.
- a holder arm 13 is pivoted for partial rotation by a pivotable supporting shaft 14 and has the pin 128 at one end 13A, the pin 128 extending horizontally and substantially parallel to the supporting shaft 14 for engaging in the opening 127 in the upright folded portion 121 of the holder 12.
- the holder arm 13 has an abutting portion 131 at the other end 13B for engaging with a pin 15 fixedly mounted on a side wall 2C of the recess 2.
- the holder arm 13 is crank-shaped in plan view and has upright folded portions 132 and 133 having through- holes for passage of the supporting shaft 14.
- the pin 128 is mounted to project from the outer surface of the upright folded portion 133.
- a coil spring 16 has a central part 16C coiled about the supporting shaft 14 and retained at terminal parts 16A and 16B by the inner surface 7B of the cover 7 and by the holder arm 13, respectively, whereby the holder arm 13 is urged to rotate clockwise about the supporting shaft 14 in Figures 3 and 4.
- the disc table 3 When the cover 7 is opened for insertion, removal or exchange of the disc 5, the disc table 3 has been returned to its initial position by the operation of sensing and driving means which sense the opening of the cover 7 and drive the table shifting means. Thus the disc presser 8 is also returned to the initial position of the disc table 3, that is, to the terminal position indicated by the arrow B in Figure 1, to be engaged and introduced into the hole 123 of the holder 12.
- the holder 12 Since the abutting portion 131 of the holder arm 13 is In abutting contact with the fixed pin 15, the holder 12 has its leading side 12A pressed down by the pin 128.
- the disc presser 8 When the cover 7 has been opened sufficiently to expose the recess 2, the disc presser 8 is restrained from shifting freely throughout the overall length of the slot 11, but is maintained within a range to permit mating of the disc presser 8 with the spindle unit 3A of the disc table 3 during closure of the cover 7.
- the disc presser 8 When the cover 7 is again rotated about the hinge 6 for closure of the recess 2, after insertion or removal of the disc 5, the disc presser 8 is correctly mated with the centre spindle unit 3A, from above the disc 5 placed on the disc table 3, due to retention of the disc presser 8 by the holder 12, so that the disc 5 may be positively chucked between the disc presser and the disc table 3.
- the apparatus is ready for playback.
- the disc 8 is rotated upon rotation of the disc table 3 by the spindle motor and the disc presser 8 is also moved in the direction of the arrow A in Figure 1 upon movement of the disc table 3'in that direction with the disc 5 remaining chucked in place between the disc presser 8 and the disc table 3.
- the objective lens 4A of the optical pick-up unit 4 is positioned in a facing relation to the lower side of the disc 5 for radially sequentially scanning the recording tracks on the disc surface starting from the innermost track.
- a guide plate 71 as means for guiding the disc 5 introduced into the recess 2.
- This guide plate 71 is mounted as a movable depending end wall obstructing an excess forward movement of the disc 5 in the recess 2 when the cover 7 is opened, that is, when the cover 7 is obliquely up as shown in Figures 1 and 6.
- the guide plate 71 is moved away from the position acting as said end wall.
- the guide plate 71 is withdrawn to a position in which a sufficient space is provided ahead of the disc 5 introduced into the recess 2, and thus the movement of the disc 5 and the disc table 3 is not obstructed by the presence of the guide plate 71.
- the cover 7 In operation, when introducing a disc 5 on the disc table 3 into the recess 2 or removing the disc 5 from the table 3, the cover 7 is manipulated to the open position. Since the cover 7 extends obliquely upward from one side of the recess, 2, it is difficult to insert or remove the disc 5 from a position directly above the disc table 3 which is maintained in the position permitting insertion of the disc 5. Thus the disc 5 needs to be inserted or removed obliquely.
- the guide plate 71 needs to be provided at a position such that the central hole 5A of the disc 5 is positioned in the vicinity of the spindle unit 3A of the disc table 3 when the disc 5 is introduced into the recess 2, while the cover 7 remains opened abutting on the guide plate 71.
- the guide plate 71 is attached directly to the rotary cover 7.
- the guide plate 71 may be provided as a separate member and may be operatively associated with other movable members of the apparatus so as to be movable upon rotation of the cover 7 between a first position permitting insertion of the disc 5 and a second position withdrawn from and hence not obstructing the radial movement of the disc 5.
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Abstract
Description
- This invention relates to recording and/or reproducing apparatus for discs for audio or the like signals.
- More particularly, the invention relates to a movable disc type recording and/or reproducing apparatus in which a disc table rotatably carrying the disc is moved radially of the disc for changing the relative position between the disc and a fixed recording and/or reproducing means including an optical pick-up unit for recording the desired information on predetermined tracks on the disc or for tracing or scanning the recorded tracks on the disc.
- A recording and/or reproducing apparatus for audio or the like signals is known in which the audio signals are recorded on a disc and read out or reproduced therefrom by a laser beam radiated towards the disc from a suitable optical pick-up unit.
- Such recording and/or reproducing apparatus is so arranged and constructed that the optical pick-up unit radiating the laser beam towards the rotating disc is moved radially of the disc for sequentially scanning the recording tracks. In this known apparatus, in order to prevent the laser beam from radiating outside during recording or reproduction, a recess for housing the disc on a disc table is covered by a pivotable disc cover. In one scanning arrangement, the optical pick-up unit is mounted fixedly on a chassis and the disc table is moved radially of the disc. In such an arrangement, the disc cover is opened to an obliquely upward position about a hinge provided close to one side of the disc recess. Thus the disc can only be inserted or removed obliquely relative to the disc table. However, when the disc is inserted into the apparatus further than is necessary, the centre spindle of the disc table tends to be out of alignment with the centre opening of the disc, resulting in a complicated disc mounting operation.
- It is also required in the recording and/or reproducing apparatus that, when the disc cover is opened for insertion or removal of the disc, the disc is inserted on the disc table and the disc cover is again closed for playback, the disc table is situated at the initial position during cover closure, and a disc presser mounted on the disc cover is correctly registered with the disc table for positively pressing the disc from above.
- According to the present invention there is provided a recording and/or reproducing apparatus for a disc, the apparatus comprising:
- a cover mounted on a main body of the apparatus so as to be movable between a first open position and a second closed position; and
- a disc presser operatively mounted on said cover to co-operate with a spindle unit to hold said disc;
- and characterised by
- a holder for said disc presser movably attached to said cover to limit lateral movement of said disc presser; and
- control means for controlling said holder to permit said lateral movement of said disc presser when said cover is in said closed position.
- The invention will now be described by way of example with reference to the accompanying drawings, in which:
- Figure 1 is a diagrammatic perspective view showing an embodiment of recording and/or reproducing apparatus according to the invention with a cover for a disc open;
- Figure 2 is a longitudinal sectional view showing a disc chucking means in the apparatus of Figure 1;
- Figure 3 is an exploded perspective view showing a disc presser holding means in the apparatus of Figure 1;
- Figure 4 is a plan view showing the disc presser holding means;
- Figure 5 is a side elevation showing control means permitting radial movement of the disc presser holder means with the cover closed; and
- Figure 6 is a side elevation showing the disc plate with the cover closed.
- The embodiment of recording and/or. reproducing apparatus for a disc and according to the invention will now be described with reference to the accompanying drawings. On an upper portion 1A of a main body 1, there is formed a
recess 2 for accommodating adisc 5. Anobjective lens 4A of an optical pick-up unit 4 and a disc table 3 are mounted in therecess 2, theobjective lens 4A facing upwards when seen in Figure 1. The optical pick-up device 4 and the disc table 3 project from an elongated opening orslot 9 in abottom wall 2B of the main body 1 and the disc table 3 is movable in theslot 9 in the direction shown by arrows A and B by feed means such as a stepping motor, not shown, so that the tracks on thedisc 5 carried on the disc table 3 can be confronted by theobjective lens 4A as a result of such radial movement of thedisc 5. - A
pivotable cover 7 for closing therecess 2 has itsbase portion 7A hinged by ahinge 6 in the vicinity of aside 2A of therecess 2. An approximately L-shaped holder cover 10 formed as a box of smaller depth at the front is mounted on theinner surface 7B of thecover 7. An elongated opening orslot 11 is formed in a lower wall 10A of theholder cover 10, and apresser plate portion 8A of thedisc presser 8 is mounted in theslot 11 to project outwardly therefrom and be movable longitudinally of theslot 11. - Reference is now made to Figure 2 for describing means for chucking the disc by the
disc presser 8 and the disc table 3. - The
disc presser 8 has acylindrical portion 8B, anupper holding ring 8C, and thepresser plate portion 8A extending downwardly from thecylindrical portion 8B. Thepresser plate portion 8A is formed with a downwardly directedcentral recess 81 and an axially projecting peripheraldisc abutment surface 82. Amagnet 83 is secured to the bottom of therecess 81. Thecylindrical portion 8B has an outside diameter to pass through theslot 11, whereas thering 8C has a diameter larger than the width of theslot 11 so that thedisc presser 8 is held by theholder cover 10. - In the illustrated embodiment, the disc table 3 has its central portion secured to an
output shaft 31 of a motor. Anannular buffer member 32, such as felt ring, is attached to the upper peripheral surface of thedisc 5, whereas acentral recess 33 is formed on the upper surface of thedisc 5. Amagnet mounting plate 34 and adisc centring plate 35 making up acentre spindle unit 3A are mounted on theoutput shaft 31 above the disc table 3. Themagnet mounting plate 34 is secured to the end of theoutput shaft 31 and amagnet 36 facing themagnet 83 of thedisc presser 8 is mounted on themagnet mounting plate 34. Adisc centring plate 35 has a taperedperipheral portion 35A engaging in acentral opening 5A of thedisc 5. Thecentring plate 35 is loosely mounted on theoutput shaft 31 for movement vertically between the disc table 3 and themagnet mounting plate 34. Aspring 37 is interposed between the centring plate 3.5 and the disc table 3. Themagnets disc 5 has itscentre hole 5A presented 'to thespindle unit 3A of the disc table 3, whereby thedisc 5 placed on thedisc centring plate 35 is centred by interfitting of themagnet mounting plate 34 with the taperedperipheral portion 35A of thedisc centring plate 35. Thecover 7 is then closed, so that thedisc presser 8 is pressed from above thedisc 5 into engagement with thespindle unit 3A. Themagnets disc presser 8, and thedisc abutment surface 82 of thedisc presser 8 is pressed against the upper surface of thedisc 5 by the resulting magnetic attraction, so that thedisc centring plate 35 is depressed against the resiliency of thespring 37 until the lower surface of thedisc 5 is pressed on theannular buffer member 32 of the disc table 3, and thedisc 5 is clamped between thedisc abutment surface 82 and theannular buffer member 32 for chucking. - Although not shown, the feed means for the disc table 3 is intended to shift the disc table 3 in the direction shown by the arrows A and B in Figure 1, for linear scanning movement of the optical pick-
up unit 4 with respect to the recording tracks of thedisc 5, and may typically be formed by a stepping motor and associated disc driving means. - Reference is now made to Figures 1 and 3 to 5 for a description of holding means for the
disc presser 8, and control means for permitting movement of thedisc presser 8 through closure of thecover 7. - The
disc presser 8 is maintained by aholder 12 at a position corresponding to the initial position of the disc table 3 when thecover 7 is opened. It is also positively urged towards the disc table 3 when thecover 7 is closed. Thedisc presser 8 is designed to be movable relative to theholder 12 when thecover 7 has been closed. Theholder 12 is formed as a flat plate having upright foldedportions central hole 123 extending to an opening 123A on a leadingside 12A. On respective sides of the opening 123A, the leadingside 12A is respectively formed with a pair of upright bent portions 124,124. Towards abase side 12B, a supportingshaft 126 carried between supporting members 125,125 projectedly mounted on theinner surface 7B of thecover 7 is passed through openings in the upright foldedportions holder 12. An elongatedcentral hole 127 is formed through the upright foldedportion 121 for accommodating apin 128 as later described. - The
hole 123 is of such size as to permit the passage of thecylindrical portion 8B of thedisc presser 8 but to obstruct the passage of thering 8C. The upright bent portions 124,124 are so arranged and constructed that, when the leadingside 12A of theholder 12 is lifted, that is, when thecover 7 is opened, the upright bent portions 124,124 are engaged with thering 8C of thedisc presser 8 for holding thepresser 8 within thehole 123 and, when the leadingside 12A is depressed, that is, when thecover 7 is closed, and thus the disc presser 8 interfits with the disc table 3 through magnetic attraction for chucking thedisc 5, the upright bent portions 124,124 are withdrawn to a lower position where they are not engageable with thering 8C, in a manner so that thering 8C can be moved outwards from the opening 123A of thehole 123. - A
holder arm 13 is pivoted for partial rotation by a pivotable supportingshaft 14 and has thepin 128 at oneend 13A, thepin 128 extending horizontally and substantially parallel to the supportingshaft 14 for engaging in the opening 127 in the upright foldedportion 121 of theholder 12. Theholder arm 13 has anabutting portion 131 at theother end 13B for engaging with apin 15 fixedly mounted on aside wall 2C of therecess 2. In the embodiment illustrated, theholder arm 13 is crank-shaped in plan view and has upright foldedportions shaft 14. Thepin 128 is mounted to project from the outer surface of the upright foldedportion 133. - A
coil spring 16 has acentral part 16C coiled about the supportingshaft 14 and retained atterminal parts inner surface 7B of thecover 7 and by theholder arm 13, respectively, whereby theholder arm 13 is urged to rotate clockwise about the supportingshaft 14 in Figures 3 and 4. - When the
cover 7 is opened for insertion, removal or exchange of thedisc 5, the disc table 3 has been returned to its initial position by the operation of sensing and driving means which sense the opening of thecover 7 and drive the table shifting means. Thus thedisc presser 8 is also returned to the initial position of the disc table 3, that is, to the terminal position indicated by the arrow B in Figure 1, to be engaged and introduced into thehole 123 of theholder 12. - Since the abutting
portion 131 of theholder arm 13 is In abutting contact with the fixedpin 15, theholder 12 has itsleading side 12A pressed down by thepin 128. - When the
cover 7 starts to be rotated about thehinge 6 for opening, the abuttingportion 131 of theholder arm 13 is moved away from the fixedpin 15 so that thearm 13 is rotated clockwise in Figures 3 and 5 under the resiliency of thespring 16, so that thepin 128 is lifted for rotating theholder 12. Thus the leadingside 12A is lifted until the upright bent portions 124,124 are engaged with thering 8C of thedisc presser 8 whereby thedisc presser 8 is retained in thecentral hole 123 of theholder 12. When thecover 7 has been opened sufficiently to expose therecess 2, thedisc presser 8 is restrained from shifting freely throughout the overall length of theslot 11, but is maintained within a range to permit mating of thedisc presser 8 with thespindle unit 3A of the disc table 3 during closure of thecover 7. - When the
cover 7 is again rotated about thehinge 6 for closure of therecess 2, after insertion or removal of thedisc 5, thedisc presser 8 is correctly mated with thecentre spindle unit 3A, from above thedisc 5 placed on the disc table 3, due to retention of thedisc presser 8 by theholder 12, so that thedisc 5 may be positively chucked between the disc presser and the disc table 3. - It should be noted that, during closure of the
cover 7, the abuttingportion 131 of theholder arm 13 is brought into abutting contact with the fixedpin 15 for rotating theshift 14 counter-clockwise in Figures 3 and 5 against the resiliency of thespring 16. Thus theend 13A of theholder arm 13 is lowered so that theholder 12 is rotated clockwise about the supportingshaft 126 on account of the engagement between thepin 128 and the elongatedcentral hole 127. Hence, the leadingside 12A of theholder 12 is lowered so that the upright bent portions 124,124 are withdrawn to a position below thering 8C of thedisc presser 8, and thedisc presser 8 is movable freely in the direction of the arrow A in Figures 4 and 5. - Therefore, with the
cover 7 thus closed, the apparatus is ready for playback. Thedisc 8 is rotated upon rotation of the disc table 3 by the spindle motor and thedisc presser 8 is also moved in the direction of the arrow A in Figure 1 upon movement of the disc table 3'in that direction with thedisc 5 remaining chucked in place between thedisc presser 8 and the disc table 3. When the optical pick-upunit 4 is driven in this state, theobjective lens 4A of the optical pick-upunit 4 is positioned in a facing relation to the lower side of thedisc 5 for radially sequentially scanning the recording tracks on the disc surface starting from the innermost track. - In the neighbourhood of the
base portion 7A of theinner surface 7B of thecover 7, which is mounted for closing therecess 2 in the main body 1, there is provided aguide plate 71 as means for guiding thedisc 5 introduced into therecess 2. - This
guide plate 71 is mounted as a movable depending end wall obstructing an excess forward movement of thedisc 5 in therecess 2 when thecover 7 is opened, that is, when thecover 7 is obliquely up as shown in Figures 1 and 6. On the other hand, when thecover 7 is closed, theguide plate 71 is moved away from the position acting as said end wall. Thus theguide plate 71 is withdrawn to a position in which a sufficient space is provided ahead of thedisc 5 introduced into therecess 2, and thus the movement of thedisc 5 and the disc table 3 is not obstructed by the presence of theguide plate 71. - In operation, when introducing a
disc 5 on the disc table 3 into therecess 2 or removing thedisc 5 from the table 3, thecover 7 is manipulated to the open position. Since thecover 7 extends obliquely upward from one side of the recess, 2, it is difficult to insert or remove thedisc 5 from a position directly above the disc table 3 which is maintained in the position permitting insertion of thedisc 5. Thus thedisc 5 needs to be inserted or removed obliquely. When thedisc 5 is introduced to the disc table 3 obliquely, a portion of the periphery of thedisc 5 abuts on theguide plate 71 then positioned as a depending end wall ahead of thedisc 5 thus facilitating the mating of thespindle unit 3A of the disc table 3 with thecentral opening 5A of thedisc 5. Hence theguide plate 71 needs to be provided at a position such that thecentral hole 5A of thedisc 5 is positioned in the vicinity of thespindle unit 3A of the disc table 3 when thedisc 5 is introduced into therecess 2, while thecover 7 remains opened abutting on theguide plate 71. - It should be noted that, when the
cover 7 is closed for playback after the insertion and loading of thedisc 5, theguide plate 71 is withdrawn to an upper position shown in Figure 5 in unison with the pivoting movement of thecover 7 to its closed position. Hence, theguide plate 71 is not a hindrance to the movement of the disc table 3 in the direction of the arrow A. - In the above embodiment, the
guide plate 71 is attached directly to therotary cover 7. Alternatively, theguide plate 71 may be provided as a separate member and may be operatively associated with other movable members of the apparatus so as to be movable upon rotation of thecover 7 between a first position permitting insertion of thedisc 5 and a second position withdrawn from and hence not obstructing the radial movement of thedisc 5.
Claims (8)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14443682U JPS5950091U (en) | 1982-09-24 | 1982-09-24 | Holder mechanism for disc holder in movable disc player |
JP14443582U JPS5950090U (en) | 1982-09-24 | 1982-09-24 | Disk-shaped disk recording and/or playback device |
JP144436/82 | 1982-09-24 | ||
JP144435/82 | 1982-09-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0104914A1 true EP0104914A1 (en) | 1984-04-04 |
EP0104914B1 EP0104914B1 (en) | 1986-12-17 |
Family
ID=26475843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83305701A Expired EP0104914B1 (en) | 1982-09-24 | 1983-09-23 | Recording and/or reproducing apparatus for discs |
Country Status (5)
Country | Link |
---|---|
US (1) | US4539671A (en) |
EP (1) | EP0104914B1 (en) |
KR (1) | KR900003884Y1 (en) |
CA (1) | CA1199877A (en) |
DE (1) | DE3368476D1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0287153A1 (en) * | 1987-04-08 | 1988-10-19 | Koninklijke Philips Electronics N.V. | Device for recording information on or reading information from an information disc |
EP0469642A3 (en) * | 1986-04-01 | 1992-04-01 | Pioneer Electronic Corporation | Disk player |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4731775A (en) * | 1984-12-03 | 1988-03-15 | Olympus Optical Company Limited | Information recording regenerating apparatus |
US4680748A (en) * | 1984-12-19 | 1987-07-14 | Kabushiki Kaisha Toshiba | Recorded disk playback apparatus |
JPS6457452A (en) * | 1987-08-28 | 1989-03-03 | Pioneer Electronic Corp | Disk clamping device |
US5053903A (en) * | 1989-03-28 | 1991-10-01 | Literal Corporation | Disk clamp positioning apparatus for information storage disk drive system |
JPH04105284A (en) * | 1990-08-24 | 1992-04-07 | Sony Corp | Optical recording and/or reproducing device |
EP0492651A3 (en) * | 1990-12-28 | 1993-01-20 | Sony Corporation | Optical disk and disk chucking mechanism |
JP2840495B2 (en) * | 1991-03-20 | 1998-12-24 | キヤノン株式会社 | Optical information recording / reproducing device |
US5881045A (en) * | 1993-08-23 | 1999-03-09 | Nakamichi Corp. | Compact changer-type disk player |
TW459216B (en) * | 1999-11-18 | 2001-10-11 | Ind Tech Res Inst | Magnet attraction type automatic elevated disk pressing tool |
USD810724S1 (en) * | 2016-08-31 | 2018-02-20 | Harman International Industries, Incorporated | Headphone |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2330818B2 (en) * | 1972-06-21 | 1976-04-22 | International Business Machines Corp., Armonk, N.Y. (V.St.A.) | DEVICE FOR CLAMPING AND CENTERING FLEXIBLE FILM DISCS |
US3980308A (en) * | 1975-03-10 | 1976-09-14 | U.S. Philips Corporation | Clamping device for a rotatable information-carrying record |
AT362163B (en) * | 1978-02-20 | 1981-04-27 | Philips Nv | OPTICAL TURNTABLE |
AT364544B (en) * | 1978-06-05 | 1981-10-27 | Philips Nv | DEVICE FOR CENTERING, ALIGNING AND CLAMPING A ROTATING DRIVE PLATE |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7609375A (en) * | 1976-08-24 | 1978-02-28 | Philips Nv | CLAMPING DEVICE FOR A ROTATING DRIVE INFORMATION-BEARING PLATE. |
NL182609C (en) * | 1977-02-10 | 1988-04-05 | Philips Nv | VIDEO RECORD PLAYER. |
US4340955A (en) * | 1978-03-27 | 1982-07-20 | Discovision Associates | Video disc player |
US4252327A (en) * | 1979-02-16 | 1981-02-24 | Mca Discovision, Inc. | Video disc player |
GB2081487B (en) * | 1980-07-01 | 1984-11-21 | Burroughs Corp | Disc mounting and centring device |
-
1983
- 1983-09-16 US US06/532,842 patent/US4539671A/en not_active Expired - Lifetime
- 1983-09-19 CA CA000436988A patent/CA1199877A/en not_active Expired
- 1983-09-23 EP EP83305701A patent/EP0104914B1/en not_active Expired
- 1983-09-23 DE DE8383305701T patent/DE3368476D1/en not_active Expired
- 1983-09-24 KR KR2019830008268U patent/KR900003884Y1/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2330818B2 (en) * | 1972-06-21 | 1976-04-22 | International Business Machines Corp., Armonk, N.Y. (V.St.A.) | DEVICE FOR CLAMPING AND CENTERING FLEXIBLE FILM DISCS |
US3980308A (en) * | 1975-03-10 | 1976-09-14 | U.S. Philips Corporation | Clamping device for a rotatable information-carrying record |
AT362163B (en) * | 1978-02-20 | 1981-04-27 | Philips Nv | OPTICAL TURNTABLE |
AT364544B (en) * | 1978-06-05 | 1981-10-27 | Philips Nv | DEVICE FOR CENTERING, ALIGNING AND CLAMPING A ROTATING DRIVE PLATE |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0469642A3 (en) * | 1986-04-01 | 1992-04-01 | Pioneer Electronic Corporation | Disk player |
EP0287153A1 (en) * | 1987-04-08 | 1988-10-19 | Koninklijke Philips Electronics N.V. | Device for recording information on or reading information from an information disc |
Also Published As
Publication number | Publication date |
---|---|
EP0104914B1 (en) | 1986-12-17 |
DE3368476D1 (en) | 1987-01-29 |
CA1199877A (en) | 1986-01-28 |
KR840006381U (en) | 1984-12-03 |
US4539671A (en) | 1985-09-03 |
KR900003884Y1 (en) | 1990-05-03 |
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